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Medication errors are more common among seriously ill patients than with those with minor conditions.

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

Operant conditioning, also known as trial-and-error learning. Operant conditioning, also known as trial-and-error learning.
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Grieving behavior can have common expressions in different cultures. Grieving behavior can have common expressions in different cultures.
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Video: Morphology of a tomato plant

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